<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <div id="app">
    <input type="text" @keyup.enter="submitFn" v-model="uname">
    <input type="text" @keyup.delete="deleteFn" v-model="address">
  </div>
  <script src="./vue.js"></script>
  <script>
    new Vue({
      el: '#app',
      data: {
        uname: '',
        address: ''
      },
      methods: {
        submitFn: function() {
          console.log(this.uname)
        },
        deleteFn: function() {
          this.address = ''
        }
      }
    })
  </script>
</body>
</html>